There is currently no way to stop calcification of the aortic valve. If all else fails, the valve must be replaced. To better understand the development of this common disease, researchers from ...

 Install the relief valve so that it will be exposed to refrigerant vapor (e.g., above the liquid level).  Install the relief valves where they are accessible for inspection and replacement.  Do ...

BACKGROUND A study was undertaken to compare the relative physiological effects of underwater seal (UWS) versus flutter valve (FV) pleural drainage systems in the treatment of postoperative air leaks.

Two broad categories of barrier devices are available: mouth-to-mask devices and face shields. Mouth-to-mask devices typically have a 1-way valve so that the victim’s exhaled air does not enter the ...